Or. Rev. Stat. § 79A.3170
(1) A security interest or agricultural lien is subordinate to the rights of:
(b) Except as otherwise provided in subsection (5) of this section, a person that becomes a lien creditor before the earlier of the time:
(6) A buyer, other than a secured party, of chattel paper takes free of a security interest if, without knowledge of the security interest and before it is perfected, the buyer gives value and:
[Formerly 79.0317]